RandomUnitVectorPolicy

class probnum.linalg.solvers.policies.RandomUnitVectorPolicy(probabilities='uniform', replace=True)

Bases: LinearSolverPolicy

Policy returning randomly drawn standard unit vectors.

Draw a standard unit vector \(e_i\) at random and return it. This policy corresponds to selecting columns of the matrix as observations.

Parameters

• probabilities (str) – Probabilities with which to choose different columns. Either uniform or rownorm.

• replace – Whether to sample with or without replacement.

Return type

None

Methods Summary

__call__(solver_state[, rng])

Return an action for a given solver state.

Methods Documentation

__call__(solver_state, rng=None)

Return an action for a given solver state.

Parameters

• solver_state (LinearSolverState) – Current state of the linear solver.

• rng (Optional[Generator]) – Random number generator.

Returns

Next action to take.

Return type

action